LX23108AL中文资料LED Drivers数据手册Microchip规格书

描述 Description

LX23108AL is a compact 8 Ports White or RGB back light LED Driver, to be used in large display notebooks, LCD monitors, and TV sets. It is designed to work together with the LX24232 LED Controller as a chipset, driving up to 32 LED strings with a variable current of up to 200mA peak. In addition, the LX23108AL provides the LX24232 LED Controller with its ports voltage samples, that facilitate the control of the LED strings supply voltage through an external DC/DC converter; minimizing the power dissipation while regulating the LED currents for all 8 strings. Current regulation is maintained within a ± 3%. The LX23108AL LED Driver includes 8 High Bandwidth Current Limiter Cells with PWM Control (ON/OFF Signal). The chip is designed to operate with external Sense Resistors. Such configuration provides maximum flexibility for system designers when scaling up or down the LED currents for meeting a wide range of high accuracy application requirements. The LX23108AL LED Driver enables a wide dimming range, achieved through a combination of LED current amplitude and PWM duty-cycle control. In addition, the chipset provides a thermally robust solution through advanced system control; including Drain Voltage Sensing for Open/Shorts events and per string Thermal Protection monitoring. The LX23108AL LED Driver is housed in a 32 pin, 5x5mm QFN package.For stringent thermal designs, please consider the LX23108AH, which has the same features but uses a QFN-32 7x7mm package.

特性 Features

·White LED, or RGB Backlight Driver for Large Size Display Panels
·Up to 8 LED Strings With ± 0.5% Precision Current Matching
·Wide Dimming Ratio with PWM Duty-Cycle and LED Current Amplitude Controls
·12 bit PWM Duty-cycle Resolution – Controlled by LX24132, LX24132A or the LX24232 LED Controllers
·8 bit Resolution for LED Current Setting – Controlled by LX24132, LX24132A or the LX24232 LED Controllers
·Open String, Short LED and Over-Temperature Protection Per Individual Channel
  ROHS, PB Free